Metallic packing.



No. 894:79'1- PATENTED JULY ZS, 1908.

s. BARNETT. METALLIC PACKING.

APPLICATION FILED. FEB. 6, 190's.

Seaweed Barnes Z 2 Toallubhom it may con'c'em;

vam STAT-25s PATENT ossrcs.

SAMUEL BARNETT, or P AL UIijWAsHINeToN.

' 7 METALLIC PACKING.

Be it known that I, SAMUEL BARNETT, a citizenof theUnited States, residing at Puyallup, in the county of Pierce-and State of Washin ton, have invented certain. new and useful full, clear, and exact descri tion of the int/en tion, such as will enable ot 16IS skilled in the art to which it appertains to makeand use the same. e

This invention relates to a composition of materials for producing a metallic packing,

' similar reciprocating parts. A

and has for its object'to 'provide' a packing embodying improved features of lubrication; and of resisting fluid pressure whereby the packing is especially useful for packing pis- J ton rods upon steam or other engines, or

Thedrawing represents a longitudinal, sec tlonal vlew of a conventionallpackmgarranged in association with a cylinder rod. or

- like moving part.

In carrying out my invention Iusemetallic-zinc, lead, tin and cop erina proximately equal parts, fused toget er 'anr formed into pellets or globules in any approved manner,

similar tothe formation and production of shot or otherwise. Anyapproved quantity of the material so formed 1s inixed With ap proximately fifty per cent. of its. weight of rass borings, and with sufficient oiled graphite to -form the combined materials into .a pasty substance, to which, at any st'age,'may

e added a small amount, as f ve per cent. of

antimonious sulfid. Layers of, this material alternate with layers of sawdust.-

In use the pasty substance, formed as above-described, is packed Within the ordinary and usualstufi'ing box about the pisto'n' rod 'or other reciprocating member, formmg'- thereby alayer or disk of the combined material.

In practice, it has been found desirable to have the inner end of the stuffing bojesuh,-.-

soft metaldplate havin' one'sideconforming to Specification of Letters Patent. Application filed matey 6, i906. Seriai No. 299,773.

mprovements in Metallic Packing; and 1 do hereby declare the following to be a r Patented m 28, 1 08'.

material is then-placed :upon thelead plate andthereon is disposed a thinlayerof elas-I tic material, preferably maple-saW-dust, a-l-. though other elastic or-fibrous, or granular .posed 'sulostantially perpendicularly tethepistonrod. The aforesaid layer of-pa ck'ing material may be'substituted' therefor Upon the layer of elastic materialis then'dis osed a sf'econd lay'er' of the packing niateria and the said layers of elastic material and, acking material may be duplicated unt the stuffing boxis filled With alayer ofthe pack-- ing material forming. the extreme layer of the The ordinary and usual completed packing.

follower is then engaged upon the outersurface of' the last-plaeed layer oflpacking ma.

* terial,' and pressure exerted thereon inany of bblts.-'

It has "been found, by repeate'd experh ments, that packing [materials or""babbitt the usual 'mannera-as by means of s'crew' of tin, and lead, or zinc and lead,or all three of the said ingredients, combined, produce a, packing or babbitting which is so soft that at times it adheres to the pistonfrod, \vhilea packing-0fbrass, is not' onlyexpensive, but

ard' enough towear the reclprocatin'g-parts,

whereasthe combination, heretofore ;de-'

scribed, is -sufficiently,hard to prevent-ad hesion to, the rod and sufficiently soft to pre' 4 vent wearing the rod, while the oiledgraph'- ite and the antimonious sulfid .produ'cel a per'-.'

fect lubrication. v L

The formation ofthe composition into pellets isfound 'to be o'f'great advantage when usedf1n combination with the brass bormgs,

for" the reason that the borings ardformed in sinuous or spiral bands into' the concavities of wl'iich the pellets-fit ivith a considerable degree of nicety, thereby producinga material offering. sufficient interstices J for the accon'i moda tion" of the oiled. graphite, but presenting sufficient metallic surface to resistt'he req- I uisite ear.

'As represented sents conventionally the end of a iston and 2- a piston rod extending througi a gland comp rising the chamber 3 and pawl 4 .carrier'l by cross head 5, and forced to positionby,"

in the draWi'ngs 1 repref means of.screws.or bolts 6'. Within the" gland themetallic packing above described as composed of brass borings, babbitt pellayers ofsawdust interposed between such .lets, antimony, etc. are shoyvnas at 7 with layers. The device as represented in the drawing is shown conventionally as a means for employing the metallic packing described and claimed.

Vvllat I claim is A metallic packing, comprising alternate layers, one of said layers comprising saw.-

dust and the other comprising a. mixture of I l l l l l l ellets of zinc, lead, tin and copper, brass 'orings, and graphite.

In. testimony whereof I affix my signature in presence of two witnesses.

SAMUEL BARNETT. Witnesses:

EMIL U. STENBERG, R. H LUND, 

